Question is ⇒ A coil with negligible resistance has 50 V across it with 10 mA. The inductive reactance is, Options are ⇒ (A) 50 ohms, (B) 500 ohms, (C) 1000 ohms, (D) 5000 ohms, (E) , Leave your comments or Download question paper.

Question is ⇒ A coil with negligible resistance has 50 V across it with 10 mA. The inductive reactance is, Options are ⇒ (A) 50 ohms, (B) 500 ohms, (C) 1000 ohms, (D) 5000 ohms, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	A coil with negligible resistance has 50 V across it with 10 mA. The inductive reactance is
A.	50 ohms [Wrong Answer]
B.	500 ohms [Wrong Answer]
C.	1000 ohms [Wrong Answer]
D.	5000 ohms [Correct Answer]
View Answer 13 -5 Explanation:- Answer : D Discuss it below : Virendra Said on 2016-11-23 13:03:56 XL=V/I=50/0.01=5000 Virendra Said on 2016-11-23 13:02:46 XL=V/L=50/0.01=5000 !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

Previous question Next question

Also Read Similar Questions Below :

⇒ Which of the following circuit elements will oppose the change in circuit current?
Capacitance
Inductance
Resistance
All of the above

⇒ A coil is wound on iron core which carries current I. The self induced voltage in the coil is not affected by
variation in coil current
variation in voltage to the coil
change of number of turns of coil
the resistance of magnetic path

⇒ In an iron cored coil the iron core is removed so that the coil becomes an air cored coil. The inductance of the coil will
increase
decrease
remain the same
initially increase and then decrease

⇒ Two coils have self-inductances of 10 H and 2 H, the mutual inductance being zero. If the two coils are connected in series, the total inductance will be
6 H
8 H
12 H
24 H

⇒ A coil induces 350 mV when the current changes at the rate of 1 A/s. The value of inductance is
3500 mH
350 mH
250 mH
150 mH

⇒ The law that the induced e.m.f. and current always oppose the cause producing them is due to
Faraday
Lenz
Newton
Coulomb

⇒ A conductor 2 metres long moves at right angles to a magnetic field of flux densit 1 tesla with a velocity of 12.5 m/s. The induced e.m.f. in the conductor will be
10 V
15 V
25 V
50 V

⇒ Find the force acting on a conductor 3m long carrying a current of 50 amperes at right angles to a magnetic field having a flux density of 0.67 tesla.
100 N
400 N
600 N
1000 N

⇒ Both the number of turns and the core length of an inductive coil are doubled. Its self-inductance will be
unaffected
doubled
halved
quadrupled

⇒ Higher the self-inductance of a coil,
lesser its weher-turns
lower the e.m.f. induced
greater the flux produced by it
longer the dela' in establishing steady current through it

⇒ Two coils have inductances of 8 mH and 18 mH and a co-efficient of coupling of 0.5. If the two coils are connected in series aiding, the total inductance will be
32 mH
38 mH
40 mH
48 mH

⇒ Lenz's law is a consecluence of the law of conservation of
induced current
charge
enery
induced e.m.f.

⇒ An open coil has
zero resistance and inductance
infinite resistance and zero inductance
infinite resistance and normal inductance
zero resistance and high inductance

⇒ The self inductances of two coils are 8 mH and 18 mH If the co-efficients of coupling is 0.5, the mutual inductance of the coils is
4 mH
5 mH
6 mH
12 mH

⇒ A 500 turns solenoid develops an average induced voltage of 60 V. Over what time interval must a flux change of 0.06 Wb occur to produce such a voltage?
0.01 s
0.1 s
0.5 s
5 s

⇒ Which of the following circuit element stores energy in the electromagnetic field?
Inductance
Condenser
Variable resistor
Resistance

⇒ Current changing from 8 A to 12 A in one second induced 20 volts in a coil. The value of inductance is
5 mH
10 mH
5 H
10 H

⇒ As per Faraday's laws of electromagnetic induction, an e.m.f. is induced in a conductor whenever it
lies perpendicular to the magnetic flux
lies in a magnetic field
cuts magnetic flux
moves parallel to the direction of the magnetic field

⇒ Two 300 µH coils in series without mutual coupling have a total inductance of
300 µH
600 µH
150 µH
75 µH

⇒ Which circuit element(s) will oppose the change in circuit current?
Resistance only
Inductance only
Capacitance only
Inductance and capacitance

⇒ Air-core coils are practically free from
hysteresis losses
eddy current losses
both (a) and (b)
none of the above

⇒ Mutually inductance between two magnetically-coupled coils depends on
permeability of the core
the number of their turns
cross-sectional area of their common core
all of the above

⇒ The direction of induced e.m.f. can be found by
Laplace's law
Lenz's law
Fleming's right hand rule
Kirchhoffs voltage law

⇒ A crack in the magnetic path of an inductor will result in
unchanged inductance
increased inductance
zero inductance
reduced inductance

⇒ Which of the following is unit of inductance?
Ohm
Henry
Ampere turns
Webers/metre

⇒ Ifcurrentin a conductor increases then according to Lenz's law self-induced voltage will
aid the increasing current
tend to decrease the amount of current
produce current opposite to the increasing current
aid tite applied voltage

⇒ In case of an inductance, current is proportional to
voltage across the inductance
magnetic field
both (a) and (b)
neither (a) nor (b)

⇒ An averaVoltage of 10 V is induced in a 250 turns solenoid as a result of a change in flux which occurs in 0.5 second. The total flux change is
20 Wb
2 Wb
0.2 Wb
0.02 Wb

⇒ The inductance df a coil will increase under all the following conditions except
when more length for the same number of turns is provided
when the number of turns of the coil increase
when more area for each turn is provided
when permeability of the core increases

⇒ A coil with negligible resistance has 50 V across it with 10 mA. The inductive reactance is
50 ohms
500 ohms
1000 ohms
5000 ohms